Electrical Test
Clamp Earth Testers
Non-intrusive loop resistance and leakage current testing.
Earth resistanceClamp test
ERT15C
Clamp earth tester for loop resistance with no disconnection required.
Earth resistanceLeakage current
ERT20C+
Adds leakage current measurement and logging/PC comms.
Quick compare — Clamp Earth Testers
| Model | Earth resistance range | Leakage current | Jaw size | |
|---|---|---|---|---|
ERT15C | 0.01–200 Ω (0.001 Ω res.) | — | Ø32 mm | View product |
ERT20C+ | 0.01–1200 Ω (0.001 Ω res.) | 0.00 mA – 20.0 A | 65 × 32 mm | View product |
How to choose a clamp earth tester
Confirm the resistance range you need (typ. 0.1–200 Ω for small loops; higher for extended networks). If you troubleshoot leakage, pick a model with current measurement. Check jaw size vs your busbars; larger sites often need 65×32 mm.